restored_path.hpp

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#pragma once

 
#include <pulp/runtime/safe_relative_path.hpp>
 
#include <filesystem>
#include <optional>
#include <system_error>
 
namespace pulp::audio {

inline std::optional<std::filesystem::path>
confine_restored_path(const std::filesystem::path& path, const std::filesystem::path& root) {
    namespace fs = std::filesystem;
    if (path.empty() || root.empty())
        return std::nullopt;
    std::error_code ec;
    const fs::path canonical_root = fs::weakly_canonical(root, ec);
    if (ec || canonical_root.empty())
        return std::nullopt;
    const fs::path joined = path.is_absolute() ? path : canonical_root / path;
    const fs::path canonical = fs::weakly_canonical(joined, ec);
    if (ec || canonical.empty())
        return std::nullopt;
    if (!pulp::runtime::is_within_directory(canonical_root, canonical))
        return std::nullopt;
    return canonical;
}
 
} // namespace pulp::audio